From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754843AbcHAS5G (ORCPT ); Mon, 1 Aug 2016 14:57:06 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41758 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754747AbcHAS4j (ORCPT ); Mon, 1 Aug 2016 14:56:39 -0400 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , David Ahern , Ingo Molnar , Namhyung Kim , Peter Zijlstra Subject: [PATCH 2/7] tools lib: Add bitmap_snprintf function Date: Mon, 1 Aug 2016 20:02:30 +0200 Message-Id: <1470074555-24889-3-git-send-email-jolsa@kernel.org> In-Reply-To: <1470074555-24889-1-git-send-email-jolsa@kernel.org> References: <1470074555-24889-1-git-send-email-jolsa@kernel.org> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Mon, 01 Aug 2016 18:02:41 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support to print bitmap list. Code mostly taken from kernel's bitmap_list_string. Link: http://lkml.kernel.org/n/tip-ictn3ke5ewrzwyn8webfeai9@git.kernel.org Signed-off-by: Jiri Olsa --- tools/include/linux/bitmap.h | 10 ++++++++++ tools/lib/bitmap.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h index 66ddd992e690..43a0d06beabb 100644 --- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -75,4 +75,14 @@ static inline unsigned long *bitmap_alloc(int nbits) return malloc(BITS_TO_LONGS(nbits) * sizeof(unsigned long)); } +/** + * bitmap_snprintf - print bitmap list into buffer + * @bitmap: bitmap + * @nbits: size of bitmap + * @buf: buffer to store output + * @size: size of @buf + */ +size_t bitmap_snprintf(unsigned long *bitmap, int nbits, + char *buf, size_t size); + #endif /* _PERF_BITOPS_H */ diff --git a/tools/lib/bitmap.c b/tools/lib/bitmap.c index 0a1adc1111fd..184d97b276a1 100644 --- a/tools/lib/bitmap.c +++ b/tools/lib/bitmap.c @@ -29,3 +29,32 @@ void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1, for (k = 0; k < nr; k++) dst[k] = bitmap1[k] | bitmap2[k]; } + +size_t bitmap_snprintf(unsigned long *bitmap, int nbits, + char *buf, size_t size) +{ + /* current bit is 'cur', most recently seen range is [rbot, rtop] */ + int cur, rbot, rtop; + bool first = true; + size_t ret = 0; + + rbot = cur = find_first_bit(bitmap, nbits); + while (cur < nbits) { + rtop = cur; + cur = find_next_bit(bitmap, nbits, cur + 1); + if (cur < nbits && cur <= rtop + 1) + continue; + + if (!first) + ret += scnprintf(buf + ret, size - ret, ","); + + first = false; + + ret += scnprintf(buf + ret, size - ret, "%d", rbot); + if (rbot < rtop) + ret += scnprintf(buf + ret, size - ret, "-%d", rtop); + + rbot = cur; + } + return ret; +} -- 2.4.11